WO2001043480A1

WO2001043480A1 - Communication exchange system and mobile communication exchange device

Info

Publication number: WO2001043480A1
Application number: PCT/JP1999/006899
Authority: WO
Inventors: Shigeharu Sue; Yoshiko Yamada
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 1999-12-09
Filing date: 1999-12-09
Publication date: 2001-06-14
Also published as: EP1152629A4; EP1152629A1

Abstract

A multi-communication system includes a roamable terrestrial portable phone system, a satellite portable phone system, and a fixed telephone system. Each communication system includes an all terminal information register in which subscriber information about all the mobile stations accommodated in the portable phone systems is registered. Each portable phone system registers the subscriber information transmitted from a mobile station in its register when the position of the mobile station is registered and broadcasts the subscriber information to the other communication systems. Each of the other communication systems registers the subscriber information in its register. Hence even if a line connection request to a mobile station is made in any communication system, the line connection request can be transferred directly to the system where the mobile station is present. Therefore, the time taken for a call to reach the mobile station is short.

Description

Description Telecommunication switching system and mobile communication switching equipment

The present invention relates to a communication switching system provided with each communication switching device provided in a plurality of mutually roamable communication systems including a plurality of mobile communication systems, and a mobile communication switching device provided in a mobile communication system About. Background art

The conventional mobile communication system has a unique service area and provides a desired service to mobile stations existing in the service area. Therefore, if a mobile station moves out of the service area, it will not be possible to receive service. However, if the destination is a service area of another mobile communication system, it would be convenient to be able to use the services of this other mobile communication system. For this reason, conventional mobile communication systems employ roaming services so that service areas of different mobile communication systems can receive services. Fig. 8 is a conceptual diagram illustrating the personal digital cellular telecommunication system (PDC), which is a Japanese digital cellular system (for example, IEICE 4/1998, p384 The mobile station (MS) 150 registers in advance, for example, a mobile communication system 160 among a plurality of mobile communication systems 160 and 170 as a home system, and identifies and identifies its own station. Home location registry (HLR) provided in the home system 160 as subscriber information 1 6 Register in 1.

When the mobile station 150 moves from the home system 160 to the service area of another mobile communication system 170, the mobile station 150 requests the location system 170 to perform location registration. In this case, the visited system 1700 sends a roaming number indicating that the mobile station 150 is roaming to the own system 170 because the mobile station 150 is not home to the own system 170. System system 160. After that, the home system 160 transmits the subscriber information registered in the HLR 161 to the visited system 170. The visiting system 170 registers the subscriber information in the gateway location registration evening (GLR) 171.

For example, when the mobile station 150 is located in the home system 160 and a line connection request is issued from the communication device 1801 of the fixed telephone system 180 to the mobile station 150, the fixed telephone The gateway exchange 182 of the system 180 transmits a line connection request signal to the home system 160. The gateway switching center (GM SC) 162 of the home system 160 that has received the line connection request signal accesses the HLR 161, confirms the position of the mobile station 150, and executes the line connection processing. I do.

On the other hand, when the mobile station 150 is talking to the other mobile communication system 170 from the home system 160, the communication device 18 1 of the fixed telephone system 180 to the mobile station 15 When a line connection request is issued to 0, the gateway exchange 18 of the fixed system 180 first accesses the home system 160 and sends a line connection request signal to the home system 170. Forward.

When the gateway exchange 162 of the home system 160 accesses the HLR 161 and recognizes that the mobile station 150 is roaming, it sends a circuit connection request signal to the visited system 170. Forward. The gateway switching station (VM SC) 17 2 of the visited system 1 Ί 0 accesses the GLR 17 1 and the mobile station 1 5 0 The subscriber information of the mobile station 150 is obtained, and a line connection request signal is transferred to the network exchange (VMSC) 173 that controls the position of the mobile station 150. Thereafter, the local exchanges 1-3 perform line connection processing via the base station (BS) 174, whereby the line is connected.

Reference numeral 175 is for registering the subscriber information of the mobile station 150 having the visited system 170 as a home.

As described above, in the conventional communication system, the gateway switching center 182 of the communication system in which the line connection request is issued first receives the call from the mobile station 150, He had to access and check the home system 170 of the mobile station 150 with the home system 160. That is, when the mobile station is moving to another mobile communication system, the line connection request processing is performed in two steps. Therefore, there was a problem that the time required for receiving a call to the mobile station was long. This problem is particularly pronounced, for example, when configured to provide cross-country roaming services and when configured to provide verbal services with satellite cellular telephone systems. is there.

More specifically, a typical example of providing roaming services across countries is the case where roaming services are provided between a PDC in Japan and a Global System for Mobile communication (GSM) in Europe. Assume, for example, that a mobile station has a PDC as its home system. In this case, when a mobile station moves to Europe 'J' l, l and calls the mobile station from a communication device connected to the fixed telephone system in Europe 'J, H, The line connection request signal sent from the talk system is sent to the PDC in Japan, and then transferred to the GSM in Europe and i where the country is located. Also, for example, when providing roaming service between GSM and a satellite mobile phone system, the mobile station uses GSM as a home system. Assume that In this case, even when the mobile station is clearly outside the GSM service area, such as at sea, the line connection request signal must be transmitted to the home system GSM once and then transferred to the satellite mobile phone system. become.

As described above, there is a problem that the larger the entire system becomes, the longer the time required for incoming calls becomes. Discovery Disclosure

Therefore, an object of the present invention is to solve the above-mentioned technical problems and to provide a communication switching system and a mobile communication switching device that can reduce the time required for receiving a call.

The present invention for achieving this object relates to a communication switching system including a communication switching device provided in each of a plurality of roaming communication systems including a plurality of mobile communication systems. Here, the communication switching device controls the line switching to the mobile station based on the subscriber information of the mobile station when receiving the line connection request signal to the mobile station. More specifically, the communication switching devices of the plurality of mobile communication systems include: first registration means for registering subscriber information transmitted from a mobile station for circuit switching control; Broadcasting means for broadcasting the subscriber information to the communication switching device of the other communication system in order to register the subscriber information in the communication switching device of the other communication system.

According to this configuration, the communication switching device that has received the subscriber information from the mobile station registers the subscriber information and broadcasts the registration to the communication switching device of another communication system for registration. Therefore, another communication switching device can receive the subscriber information and register the received subscriber information. That is, the communication switching device is housed in another mobile communication system. Therefore, the subscriber information of the mobile station to be registered can be registered in its own system. Therefore, no matter which communication system issues a line connection request to the mobile station, the communication system that receives the line connection request Circuit switching control can be performed simply by referring to the registered contents of the own system. Therefore, it is possible to reduce the time required for terminating a mobile station as compared with the related art which has to access the home system. Therefore, the incoming call processing can be performed smoothly, and the service to the user can be improved.

The broadcast transmitting means adds the address of the communication switching device of the broadcast transmission destination to the subscriber information, and broadcasts the subscriber information to which the address is added via a ground common channel. It may be transmitted. According to this configuration, for the 'send the subscriber information in the communication system ^one common form, the communication switching device on the reception side can be received reliably register the subscriber information.

Further, the broadcast transmitting means adds an address of a communication switching device of a broadcast transmission destination to the subscriber information, and broadcasts the subscriber information to which the address has been added via a satellite communication channel. May be used. According to this configuration, when transmitting / receiving a line connection request via the terrestrial common channel, the congestion of the terrestrial common channel is also reduced as compared with the case where the subscriber information is transmitted / received via the terrestrial common channel. Can be eased. Therefore, the time required for receiving a call can be further reduced. Therefore, the service to the user can be further improved.

Further, the communication switching device of the mobile communication system may be provided in a terrestrial mobile phone system or a satellite mobile phone system. According to this configuration, for example, even when it is possible to talk between terrestrial mobile phone systems across countries, Even when it is possible to talk with a mobile telephone system, circuit switching control to a mobile station can be realized simply by referring to the registration means of the own system. Therefore, even if the entire system is large-scale, the time required for incoming calls to the mobile station can be greatly reduced.

Furthermore, the present invention may include a specific communication system including a predetermined specific mobile communication system, and a communication system other than the above-mentioned specific communication system including the above-described non-specific mobile communication system. In this case, the communication switching devices of all the mobile communication systems are configured to register the subscriber information transmitted from the mobile station in the communication switching devices of the other specific communication systems. It has a means for broadcasting only to the communication switching device of the system. Further, the specific mobile communication system has first registration means for registering the subscriber information transmitted from the mobile station for circuit switching control. Further, the communication switching devices of all the specific communication systems including the specific mobile communication system described above broadcast the subscriber information broadcast from the communication switching devices of the other mobile communication systems for circuit switching control. The second registration means is provided only in the communication switching device of the specific communication system.

According to this configuration, the second registration means for registering the subscriber information of all the mobile stations is provided only in the specific communication system, so that the means for registering the subscriber information in all the communication systems is provided. In comparison, a system can be constructed at a lower cost. Therefore, the number of roaming-capable communication systems can be increased at low cost, which is very convenient for users. As a core system, for example, when roaming can be performed across countries, a mobile communication system in the core country can be considered. As a result, it is easy to provide oral services and contribute to improving services for users. Can be

Further, the communication switching device of the mobile communication system other than the above-mentioned mobile communication system registers the subscriber information from the mobile station having its own system as a home system among the subscriber information transmitted from the mobile station for circuit switching control. Local registration means, and when a line connection request signal to a mobile station for which subscriber information is not registered by the local registration means is received, the line connection request signal is transmitted to the communication switching device of the specific communication system. It may have transfer means for transferring.

According to this configuration, the communication switching device of the mobile communication system other than the specified one receives a line connection request signal from a mobile station whose home system is not the home system. The specified communication system that registers the subscriber information of all the mobile stations. It is forwarded to the exchange installed in the office. Therefore, even if a line connection request is issued in a service provider of a mobile communication system other than the specific one, line connection can be reliably performed. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a conceptual diagram showing a configuration of a multi-communication system to which a communication switching system according to Embodiment 1 of the present invention is applied.

FIG. 2 is a block diagram showing an internal configuration of the GMSC according to the first embodiment.

FIG. 3 is a block diagram showing an internal configuration of a gateway exchange related to the first embodiment.

FIG. 4 is a conceptual diagram showing a configuration of a multi-communication system to which a communication switching system according to Embodiment 2 of the present invention is applied.

FIG. 5 is a block diagram showing an internal configuration of the GMSC according to the second embodiment. FIG. 6 is a conceptual diagram showing a configuration of a multi-communication system to which a communication switching system according to Embodiment 3 of the present invention is applied.

FIG. 7 is a block diagram showing the internal configuration of the GMSC according to the third embodiment.

FIG. 8 is a conceptual diagram showing a configuration of a conventional multi-communication system. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiment 1

FIG. 1 is a conceptual diagram showing a configuration of a multi-communication system to which a communication switching system according to Embodiment 1 of the present invention is applied. This multi-communication system includes three terrestrial mobile phone systems 1, one satellite mobile phone system 2 and one landline phone system 3. Note that the number of each of the systems 1 to 3 is not limited to this, and can be any number. The terrestrial mobile phone system 1 and the satellite mobile phone system 2 each have a unique service area and can roam with each other. That is, the multi-communication system includes a multi-mode mobile station 4, and the mobile station 4 can be used even if it moves to the service area of any of the mobile phone systems 1 and 2. The mobile phone systems 1 and 2 and the fixed phone system 3 can communicate with each other. More specifically, all three terrestrial mobile phone systems 1 employ GSM as a communication mode and are operated in different countries. The terrestrial mobile phone system 1 consists of multiple base stations (BS) 10, multiple gateway mobile switching centers (GMSC). GMSC: Gateway Mobileservices Switching Center (GMSC) 11 1, Less than Below it is called "VM SC". VM SC: Visitor Mobileservices Switching Center) 12 and multiple terminal information registers 13 In FIG. 1, only one of these base station 10, GM SC 11, VM SC 12 and all terminal information register 13 is shown for convenience.

The base station 10 performs wireless communication with the mobile station 4. GMSC 11 is wired to other terrestrial mobile phone systems 1 and satellite mobile phone systems 2 and landline phone systems 3 that can be roamed to each other. The GMSC 11 controls circuit switching between the own system 1 and the other communication systems 1 to 3 described above. The VMSC 12 controls line switching within the own system 1 and controls a plurality of base stations 10.

The All Terminal Information Register 13 stores subscriber information on all mobile stations 4 accommodated in the terrestrial mobile phone system 1 and the satellite mobile phone system 2, that is, mobile station identification information and location information in association with each other. Is what you do. Multiple terminal information registers 13 are provided at geographically separated locations, for example, Tokyo and Osaka. All terminal information register 13 is connected to all GMSC 11 and VMSC12. Access to all terminal information registers 13 of GM S C 11 and VM S C 12 is performed via a terrestrial common channel.

The satellite mobile phone system 2 includes one or a plurality of communication satellites (only one is shown in FIG. 1 for convenience) 20 and a plurality of earth stations 21 _(the communication satellite 20 includes: It relays satellite communication signals transmitted and received between the mobile station 4 and the earth station 21. The earth station 21 includes one or more GM SCs 22 and a plurality of VM SCs 23 and all terminals. Information Regis 24 is provided.

The GM SC 22 is wired to the terrestrial mobile phone system 1 and the landline phone system 3, and controls circuit switching between the phone systems 1 and 3. It is. The VMS C 23 controls circuit switching within its own system 2 and performs wireless communication with the mobile station 4 via the communication satellite 20. All terminals Information Regis 24 is connected to all GM SC22 and VMSC23. In the satellite mobile phone system 2, access to the terminal information registry 24 is performed via a common ground channel.

The fixed telephone system 3 includes a plurality of gateway exchanges 30, a plurality of intra-network exchanges 31, a terminal information register 32, and a fixed communication device 33. The gateway exchange 30 has the same function as the GMSC 11. That is, the gateway exchange 30 is connected to the terrestrial mobile phone system 1 and the satellite mobile phone system 2 by wire, and controls line switching between the mobile phone systems 1 and 2. The intra-network switching center 31 has a function similar to that of the VMSC 12 and controls circuit switching in the own system 3. The all terminal information register 32 is connected to all the gateway exchanges 30 and the intra-network exchange 31. In the fixed telephone system 3, access to the terminal information register 32 is performed via a terrestrial common channel.

As described above, in this multi-communication system, the terrestrial mobile phone system 1, the satellite mobile phone system 2, and the fixed telephone system 3 are connected via the GMS Cs 11, 22 and the gateway exchange 30. In the first embodiment, a system that includes the GMS Cs 11 and 22 of each of the systems 1 to 3 and the gateway exchange 30 and the all terminal information registers 12, 24, and 32 is defined in the claims. Corresponds to a communication switching system.

FIG. 2 is a block diagram showing the internal configuration of the GMSC 11 of the terrestrial mobile phone system 1. The GMS C22 of the satellite mobile phone system 2 has the same configuration as that of the GMSC11.

The GMS C 11 has a first transmitting / receiving unit 40, a control unit 41, and a second transmitting / receiving unit 42. The first transmitter / receiver 40 is connected to the other mobile phone system 1 and It is connected to the star mobile phone system 2 and the landline phone system 3. The first transmission / reception unit 40 sends and receives various signals to and from the other telephone systems 1 to 3.

Specifically, first transmitting / receiving section 40 receives a control signal and a communication signal transmitted from other telephone systems 1-3. The control signals include a line connection request signal and a subscriber information signal. The line connection request signal is a signal for requesting the mobile station 4 to connect to the line. The subscriber information signal is a signal having subscriber information including the identification information and the location information of the mobile station 4.The first transmitting / receiving unit 40 transmits the control signal and the communication signal to other telephone systems 1 to Send to 3. The first transmission / reception unit 40 gives the received signals to the control unit 41 and receives a signal to be transmitted from the control unit 41.

The second transmitting / receiving section 42 is connected to the VMSC 12 in the system. The second transmission / reception unit 42 receives a control signal and a communication signal represented by the subscriber information signal transmitted from the VMSC 12 and transmits the control signal and the communication signal to the VMSC 12 Or The second transmission / reception unit 42 gives each received signal to the control unit 41 and receives each signal to be transmitted from the control unit 41.

The control unit 41 corresponds to a control center of the GMSC 11 and executes various processes necessary for circuit switching. More specifically, the control unit 41 includes: a processing unit 43; a first transmission control unit 44; a second transmission control unit 45; a broadcast transmission control unit 46; a registration control unit 47; It has a part 48.

The signal processing unit 43 processes each signal output from the first transmitting / receiving unit 40 and the second transmitting / receiving unit 42. Specifically, the signal processing unit 43 registers the subscriber information of the mobile station 4 in the all terminal information register 13 at the time of location registration, and also transmits the subscriber information to the other telephone systems 1 to 3. Broadcast to Trust.

More specifically, the mobile station 4 existing in the own system 1 transmits a position registration request signal to the nearest base station 10 when the power is turned on, for example. The location registration request signal includes mobile station identification information. Upon receiving the location registration request signal, base station 10 transmits a subscriber information signal including mobile station identification information and location information to VMSC 12. VMSC12 transfers this subscriber information signal to GMSC11.

Upon receiving this subscriber information signal, the second transmission / reception section 42 of GMSC 11 transfers the subscriber information signal to the signal processing section 43 in the control section 41. The signal processing unit 43 extracts mobile station identification information and location information from the received subscriber information signal, and supplies the location information and the like to the registration control unit 47. The registration control unit 47 accesses the all terminal information register 13 via the terrestrial common channel, and registers the position information in the all terminal information register 13 in association with the mobile station identification information.

In addition, the signal processing unit 43 gives the received subscriber information signal to the broadcast transmission control unit 46. The broadcast transmission control unit 46 adds a broadcast destination address to the subscriber information signal. In this case, the broadcast transmission control unit 46 adds the addresses of the GMSCs 11 and 22 of the other telephone systems 1 to 3 and the gateway exchange 30 to the subscriber information signal.

After that, the broadcast transmission control section 46 gives the subscriber information signal with the address to the first transmission / reception section 44. Upon receiving the subscriber information signal, first transmitting / receiving section 44 broadcasts the subscriber information signal to other telephone systems 1-3 via a terrestrial common channel in accordance with the address of the received subscriber information signal. Send.

In addition, when the signal processing unit 43 receives a subscriber information signal transmitted from another mobile phone system 1 or 2 by broadcast transmission, the signal processing unit 43 receives the subscriber information. The subscriber information in the broadcast signal is registered in the terminal information register 13 through the registration control unit 47.

In this way, the GMSC 11 registers the subscriber information transmitted from the mobile station 4 in the all-terminal information register 13 and broadcasts the subscriber information to the other telephone systems 1 to 3. I do. Subscriber information broadcast from other mobile phone systems 1 and 2 is registered in all terminal information register 13. As a result, the subscriber information of all the mobile stations 4 is registered in the all terminal information register 13.

Further, the signal processing unit 43 controls circuit switching based on the subscriber information registered in the all terminal information register 13. For example, it is assumed that a line connection request signal has been transmitted from the mobile station 4 existing in the servicer of the own system 1. In this case, the line connection request signal is received by the second transmission / reception unit 42 and given to the signal processing unit 43 of the control unit 41.

The signal processing unit 43 extracts the identification information of the mobile station 4 to be connected, which is included in the line connection request signal, and provides the mobile station identification information to the search control unit 48. The search control unit 48 accesses the all-terminal information register 13 to acquire position information corresponding to the given mobile station identification information. In this case, the subscriber information of all the mobile stations 4 accommodated in all the mobile phone systems 1 and 2 is registered in the all terminal information register 13. Therefore, the search control unit 48 can reliably search for the position information corresponding to the given mobile station identification information. The search control unit 48 gives the acquired position information and the like to the signal processing unit 43.

The signal processing unit 43 determines whether or not the mobile station 4 exists in the service provider of the own system 1 based on the given location information. If the mobile station 4 does not exist in the service area of the own system 1, that is, if it exists in the service area of the other mobile phone systems 1 and 2, the signal processing unit 4 3 transfers the line connection request signal to the mobile phone system indicated by the location information via the common ground channel.

More specifically, the signal processing unit 43 supplies the first transmission control unit 44 with the line connection request signal and the position information. The first transmission control unit 44 adds the address of the mobile phone system corresponding to the position information to the line connection request signal, and gives the address to the first transmission / reception unit 40. The first transmission / reception unit 40 transmits a line connection request signal to the mobile phone system specified by the address via the common ground channel.

As described above, since the subscriber information of all the mobile stations 4 is registered in the all terminal information register 13, the GMSC 11 requests the mobile communication system in which the mobile station 4 is located to make a line connection request. Signals can be transferred directly. On the other hand, when the mobile station 4 exists in the service area of its own system, the signal processing unit 43 specifies the VMSC 12 to which the line connection request signal should be transferred. The signal processing unit 43 notifies the specified VMSC 12 and transfers the line connection request signal to the second transmission control unit 45. The second transmission control unit 45 adds the address of the specified VMSC 12 to the line connection request signal, and then supplies the line connection request signal to the second transmission / reception unit 42.

The second transmission / reception unit 42 transmits a line connection request signal to the VMSC 12 corresponding to the above address via a terrestrial common channel. The VMSC 12 executes a general call via the ground common channel based on the line connection request signal, and transfers a response signal returned from the mobile station 4 via the ground common channel to the GMSC 11. The signal processing section 43 of the GMSC 11 executes the line connection based on the response signal. As a result, circuit switching is achieved.

The GMSC 11 may transfer a line connection request signal from another telephone system 1 to 3. In this case, GMSC 1 1 Check the position of the partner mobile station 4 and execute the line connection process. Specifically, the signal processing unit 43 in the GMSC 11 searches the terminal information register 13 based on the mobile station identification information in the line connection request signal, and confirms the position of the mobile station 4. . After that, the signal processing unit specifies the VMSC 12 to which the line connection request signal is to be transferred, as in the case where the mobile station 4 exists in the service area of the own system 1, and then performs the same processing as described above.

FIG. 3 is a block diagram showing the internal configuration of the gateway exchange 30 of the fixed telephone system 3. The gateway switching center 30 has almost the same function as the GMSC 40, and thus has a configuration almost similar to the configuration of the GMSC 11 shown in FIG. However, the gateway exchange 30 differs from the GMSC 11 in that the broadcast control unit 46 in the GMSC 11 is not provided. That is, the fixed telephone system 3 does not receive the position registration request signal from the mobile station 4 and therefore does not obtain the subscriber information to be broadcast to another communication system.

More specifically, the gateway exchange 30 includes a first transmission / reception unit 50, a control unit 51, and a second transmission / reception unit 52. The control unit 51 includes a signal processing unit 53, a first transmission control unit 54, a second transmission control unit 55, a registration control unit 56, and a search control unit 57.

When receiving the subscriber information signal broadcast from the terrestrial mobile phone system 1 or the like, the control unit 51 of the gateway switching center 30 registers the subscriber information in the all terminal information register 32. That is, the subscriber information of all the mobile stations 4 is registered in the all-terminal information register 32.

Therefore, when a line connection request signal is transmitted from the fixed communication device 33 to the mobile station 4 via the intra-network switching center 31, the gateway switching center 30 registers the all terminal information registry 32. By referring to the contents, a line connection request signal is sent to the mobile phone systems 1 and 2 where the mobile station 4 to be connected Can be transferred directly.

As described above, according to the first embodiment, at the time of location registration, the subscriber information of the mobile station is shared with all other mobile communication systems and fixed telephone systems that can roam from an arbitrary mobile communication system. The information is to be transmitted. Therefore, the mobile communication system and the fixed telephone system 3 that have received the line connection request signal can directly access the visited system.

Therefore, compared to the conventional technology which has to go through the home system, the time of arrival at the mobile station 4 can be greatly reduced. Therefore, the incoming call processing can proceed smoothly, and the service to the user can be improved. This is particularly effective in a complex multi-communication system that allows roaming between the GSM and the satellite mobile phone system, as described above.

Embodiment 2

FIG. 4 is a conceptual diagram showing a configuration of a mobile communication system according to Embodiment 2 of the present invention. In FIG. 4, the same reference numerals are used for the same functional parts as in FIG.

In the first embodiment, a case where all the terminal information registers 13, 24, and 32 are provided in all of the terrestrial mobile phone system 1, the satellite mobile phone system 2, and the landline phone system 3 configuring the multi-communication system Is taken as an example. On the other hand, the second embodiment exemplifies a case in which all terminal information registers are provided only in a specific communication system among a plurality of communication systems forming a multi-communication system. This has the effect of reducing the storage capacity of the registry when viewed as a whole multi-communications system.

More specifically, in the second embodiment, two terrestrial mobile phone systems 60 out of the terrestrial mobile phone system 1 in the first embodiment are connected to the non-core system. Are set in advance. In other words, in the second embodiment, one terrestrial mobile phone system 1, satellite mobile phone system 2, and fixed telephone system 3 are predetermined as core systems. Here, a core system refers to a communication system built in an area that spans multiple countries, for example, in an economically core country, or a system built in one country, for example, in an economically core area. It may be a communication system.

In this case, the configuration of the fixed telephone system 3 is exactly the same as that of the first embodiment. On the other hand, the terrestrial mobile phone system 1 and the satellite mobile phone system 2 are the same as the first embodiment except that the function of the broadcast transmission control unit 46 is different.

That is, the broadcast transmission control unit 46 of the GMSC 70 of the terrestrial mobile phone system 1 and the GMSC 80 of the satellite mobile phone system 2 receives a specific information from the signal processing unit 43 when receiving the subscriber information signal. Only the address of the communication system is added to the subscriber information signal. In this case, the specific communication system is a communication system predetermined as a core system. That is, instead of broadcasting the subscriber information signal to all communication systems, the subscriber information signal is broadcast only to the core system.

On the other hand, the configuration of the terrestrial mobile phone system 60, which is a communication system other than the core system, is significantly different from that of the first embodiment. More specifically, the terrestrial mobile phone system 60 includes a local register 61 instead of the all terminal information register, and further includes a GMSC 62 that is functionally different from the first embodiment. Base station 10 and VMSC 12 are the same as in the first embodiment. The local register 61 registers only the subscriber information of the mobile station 4 having the terrestrial mobile phone system 60 as a home system. Therefore, it has a smaller storage capacity than all terminal information registers 13, 24, and 32. FIG. 5 is a block diagram showing the internal configuration of GMSC 62. The GMSC 62 includes a first transmission / reception unit 40 and a second transmission / reception unit 42 similarly to the first embodiment, and further includes a control unit 90 that is functionally different from the first embodiment. The control unit 90 includes a first transmission control unit 44, a second transmission control unit 45, and a registration control unit 47 having the same functions as in the first embodiment. Further, the control unit 90 includes a signal processing unit 91, a broadcast transmission control unit 92, and a search control unit 93, which are functionally different from the first embodiment.

When the signal processing unit 91 receives a subscriber information signal for location registration from the mobile station 4 existing in the own system 60 via the second transmitting / receiving unit 42, the signal processing unit 91 requests the location registration. The station 4 determines whether or not the own system 60 is the home system.

If the mobile station 4 has the I-system 60 as a home system, the signal processing section 91 registers the subscriber information of the mobile station 4 in the low-level register 61 via the registration iliij control section 47. . If it is not the mobile station 4 that uses its own system 60 as the home system, the signal processing unit 91 does not register with the local registry 61 and sends the subscriber information signal to the broadcast transmission control unit 92. And, it broadcasts only to the core system via the first transmission / reception unit 40. As a result, in the core system, the subscriber information of the mobile station 4 existing in the service area of the terrestrial mobile phone system 60 is transmitted to all terminals in the own system 1, 2, and 3 Information registers 1, 3, 24, and 3 2 can be registered.

Also, when receiving a line connection request signal from the mobile station 4 located in the service area of the signal processing unit 91 and the own system 60 via the second transmitting / receiving unit 42, the mobile station identification information of the line connection partner is received. This is given to the search control unit 93. The search control unit 93 accesses the local registry 71 and searches for the subscriber information of the mobile station 4 based on the given mobile station identification information.

The mobile station 4 to which the line is connected has its own system 60 as the home system. In the case of a mobile station, the search control section 93 can search for the subscriber information of the mobile station 4 from the local registry 71. Moreover, the position indicated by the subscriber information is within the service area of the own system 60. The search control section 93 gives the subscriber information to the signal processing section 91. Based on the subscriber information, the signal processing unit 91 sends a signal via the second transmission control unit 45 and the second transmission / reception unit 42 to the VMSC 12 that controls the location where the mobile station 4 to be connected to the line exists. It transfers the line connection request signal to it.

On the other hand, when the mobile station 4 to be connected to the line is not the mobile station whose home system 60 is the home system, the subscriber information of the mobile station 4 is not registered in the local registry 61. Also, even if the own system 60 is the home system, if the mobile station 4 exists in a service provider such as another terrestrial mobile phone system 1, the mobile station 4 is added to the local register 61. Information is not registered. However, the subscriber information of all the mobile stations 4 is registered in all terminal information registers 13, 24, 32 provided in the core systems 1, 2, 3.

Therefore, if the subscriber information of mobile station 4 to be connected to the line is not registered in local registry 61, search control unit 93 returns an unregistered signal to signal processing unit 91. Upon receiving the unregistered signal, the signal processing section 91 accesses another terminal mobile phone system in the vicinity of the own system 60 in order to access all terminal information registers provided closest to the own system 60. 1. Transfer the line connection request signal to the satellite mobile phone system 2 or the fixed phone system 3.

Upon receiving the line connection request signal, each of the systems 1, 2, or 3 as the core system refers to the terminal information register 1, 3, 24, or 32 of the terminal information register and reads the mobile station 4 of the line connection partner. Identify the serving system of Thereafter, each of the systems 1, 2 or 3 is transferred to the system in which the mobile station 4 is located. The line connection request signal is transferred directly.

As described above, according to the second embodiment, since all terminal information registers 13, 24, and 32 are provided only in each of the systems 1, 2, and 3 as core systems, all communication systems are fully equipped. The storage capacity of the entire multi-communications system can be reduced as compared with the case of Embodiment 1 including the terminal information register. Therefore, a multi-communications system can be constructed economically. Therefore, the service to the user can be further improved.

Embodiment 3

FIG. 6 is a conceptual diagram showing a configuration of a multi-communication system to which a communication switching system according to Embodiment 3 of the present invention is applied.

In the first and second embodiments, the broadcast of the subscriber information signal is performed through a wired ground common channel. On the other hand, in the third embodiment, the broadcast transmission of the subscriber information signal is performed via the satellite communication channel. As a result, since the terrestrial common channel is not used for broadcast transmission, congestion in the terrestrial common channel can be reduced. As a result, the line connection request signal can be transmitted and received more smoothly, so that the time required for receiving a call can be further reduced.

More specifically, the multi-communication system according to the third embodiment includes a communication satellite 100 for broadcast transmission. The communication satellite 100 may be, for example, a satellite dedicated to broadcast transmission, or may be another communication satellite such as the communication satellite 200 provided in the satellite mobile phone system 3. The communication satellite of the system may be used. In addition, the GMSC 110 of the terrestrial mobile phone system 1, the GMSC 120 of the satellite mobile phone system 2 and the gateway exchange 130 of the fixed telephone system 3 according to the multi-communication system are connected via the communication satellite 100. To send and receive subscriber information. FIG. 7 is a block diagram showing the internal configuration of the GMSC 110 according to the third embodiment. The internal configuration of GMSC 120 is the same as the internal configuration of GMSC 110.

The GMSC 110 includes a satellite communication unit 111 in addition to the configuration in the first embodiment. The satellite communication unit 111 is connected to the broadcast transmission control unit 46, and transmits and receives the subscriber information signal via the communication satellite 100. More specifically, upon receiving the subscriber information signal from the broadcast control section 46, the satellite communication section 111 converts the subscriber information signal into a satellite communication signal and then transmits the signal via the communication satellite 100. To other telephone systems 1, 2, and 3. That is, the satellite communication unit 111 broadcasts the subscriber information signal via the satellite communication channel.

In addition, upon receiving a subscriber information signal transmitted by broadcast satellite transmission from another mobile phone system 1 or 2 via a satellite communication channel, the satellite communication unit 111 transmits the subscriber information signal to the signal. This is given to the processing unit 43. The signal processing unit 43 extracts mobile station identification information and location information from the subscriber information signal, and registers the mobile station identification information and the like in the all terminal information register 13 via the registration control unit 47. Let it.

In the case of Embodiment 2 in which the core system is set, it goes without saying that the broadcast destination is the communication system as the core system, and it is also necessary to register the subscriber information of all the mobile stations 4 in the core. Needless to say, it is a communication system as a system.

In addition, the gateway exchange 130 of the fixed telephone system 3 includes a satellite communication unit 131, as shown by a two-dot chain line in FIG. The satellite communication unit 1331 receives the subscriber information signal transmitted from the other mobile phone systems 1 and 2 via the communication satellite 100 and broadcasted from the other mobile phone systems 1 and 2, and receives the received subscriber information signal. To the signal processing section 53, and a function to transmit satellite communication signals. Is not provided.

As described above, according to the third embodiment, the broadcast transmission of the subscriber information signal is performed via the satellite communication channel, so that congestion in the terrestrial common channel can be reduced. Therefore, the line connection request signal can be transmitted and received more smoothly, so that the time required for receiving a call can be further reduced. Therefore, the service for the user can be further improved.

Other embodiments

The description of the embodiment of the present invention is as described above, but the present invention is not limited to the above embodiment. For example, in the above embodiment, a case is described in which the subscriber information of the mobile station 4 is shared between different mobile communication systems. However, the present invention can be easily applied to, for example, a case where a single mobile communication system is configured with a plurality of exchange systems centered on switching centers that are the core of the number. In other words, if the BSC is GMSC and the other MSCs connected to the core exchange fej are VMSC, one mobile communication system can be a multi-communication system.

Claims

The scope of the claims

1. Each of a plurality of roaming-capable communication systems including a plurality of mobile communication systems is provided, and when a line connection request signal to the mobile station is received, a line to the mobile station based on subscriber information of the mobile station. A communication switching system comprising a communication switching device for controlling the exchange,

The communication switching device of the mobile communication system,

First registration means for registering the subscriber information transmitted from the mobile station for the circuit switching control,

Broadcast transmission means for simultaneously transmitting the subscriber information transmitted from the mobile station to the communication switching device of the other lightning system in order to register the subscriber information in the communication switching device of another communication system. There is a telecommunication switching system.

2. In section 1 of the request range, the broadcast sending means adds the address of the communication switching device of the broadcast destination to the subscriber information, and the subscriber information to which this address has been added. Is a message exchange system that broadcasts over a terrestrial common channel.

3. In claim 1, the broadcast transmitting means adds the address of the communication switching device of the broadcast destination to the subscriber information, and transmits the subscriber information to which this address has been added to the satellite. A communication switching system that broadcasts via a communication channel.

4. In claim 1, the communication switching equipment tK of the other communication system has second registration means for registering the subscriber information transmitted by the broadcast transmission means for the circuit switching control. Is a telecommunication switching system.

5. In Claim 1, the communication switching device of the mobile communication system is a communication switching system provided in a terrestrial mobile phone system or a satellite mobile phone system.

6. Each of a plurality of roaming-enabled communication systems including a plurality of mobile communication systems is provided, and when a line connection request signal to the mobile station is received, a line to the mobile station is generated based on the subscriber information of the mobile station. A communication switching system comprising a communication switching device for controlling the exchange,

The plurality of communication systems includes a specific communication system including a predetermined specific mobile communication system, and the non-specific communication system including the non-specific mobile communication system,

The communication switching devices of all of the above-mentioned mobile communication systems are configured to register the subscriber information transmitted from the mobile station in the communication switching device of the above-mentioned specific communication system. It has means for broadcasting only to the switching equipment,

The above specific mobile communication system has first registration means for registering the subscriber information sent from the mobile station for circuit switching control,

The communication switching devices of all specific communication systems including the specific mobile communication system described above register subscriber information broadcast from the communication switching devices of other mobile communication systems for circuit switching control. A communication switching system having two registration means-the second registration means is provided only in the communication switching device of the specific communication system.

7. In claim 6, the communication switching device of the mobile communication system other than the above-mentioned specified

Role registration means for registering, for circuit switching control, subscriber information from the mobile station whose home system is the home system among the subscriber information transmitted from the mobile station;

Transfer means for transferring the line connection request signal to the communication switching device of the specific communication system when receiving a line connection request signal to a mobile station for which the subscriber information is not registered by the local registration means. Have There is a telecommunication switching system.

8. A mobile communication switching device that controls circuit switching with a mobile station based on subscriber information of the mobile station when a circuit connection request to the mobile station is received, and the subscriber transmitted from the mobile station. Means for registering information for line connection control,

Means for broadcasting the subscriber information transmitted from the mobile station to a communication switching device of another communication system in order to register the subscriber information in a communication switching device of another communication system which is predetermined as a roaming target; Means for registering, for the circuit switching control, subscriber information transmitted from a communication switching device of another mobile communication system.